// Copyright (C) Kumo inc. and its affiliates.
// Author: Jeff.li lijippy@163.com
// All rights reserved.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published
// by the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.
//


#pragma once


#include <vector>

#include <kmsql/sql/grammar/expr.h>

namespace kmsql {
    enum StatementType {
        kStmtError, // unused
        kStmtSelect,
        kStmtImport,
        kStmtInsert,
        kStmtUpdate,
        kStmtDelete,
        kStmtCreate,
        kStmtDrop,
        kStmtPrepare,
        kStmtExecute,
        kStmtExport,
        kStmtRename,
        kStmtAlter,
        kStmtShow,
        kStmtTransaction
    };

    // Base struct for every SQL statement
    struct SQLStatement {
        SQLStatement(StatementType type);

        virtual ~SQLStatement();

        StatementType type() const;

        bool isType(StatementType type) const;

        // Shorthand for isType(type).
        bool is(StatementType type) const;

        // Length of the string in the SQL query string
        size_t stringLength;

        std::vector<Expr *> *hints;

    private:
        StatementType type_;
    };
} // namespace kmsql
